Icom IC-7800 Service Manual Addendum page 329

Jul. 2008
BPF UNIT (2)
BUS LINE1
+15V
BPOE
VHDWA R907 100 VHDWIA
VPR2A R906 100 VPR2IA
B0A R101 100 BI0A
B1A R102 100 BI1A
B2A R103 100 BI2A IC101
BU2099FV
B3A R104 100 BI3A
B4A R105 100 BI4A 1 20
VSS VDD
B5A R106 100 BI5A 2 19
NC OE
B6A R107 100 BI6A BPDAT 3 18
DATA SO
B7A R108 100 BI7A BPCKA 4 17 BI10WA
CLOCK Q11
B8A R117 100 BI8A BPSTA 5 16 BI10A
LCK Q10
B9A R118 100 BI9A BI0A 6 15 BI9A
Q0 Q9
B10A R119 100 BI10A BI1A 7 14 BI8A
Q1 Q8
B10WA R120 100 BI10WA BI2A 8 13 BI7A
Q2 Q7
HF50A R121 100 HF50IA BI3A 9 12 BI6A
Q3 Q6
ATT12A R122 100 AT12IA BI4A 10 11 BI5A
Q4 Q5
ATT6A R123 100 AT6IA
ATT3A R124 100 AT3IA
+15V +15V
VHDWB R957 100 VHDWIB
VPR2B R956 100 VPR2IB
B0B R451 100 BI0B
B1B R452 100 BI1B
B2B R453 100 BI2B IC401
BU2099FV
B3B R454 100 BI3B
B4B R455 100 BI4B 1 20
VSS VDD
B5B R456 100 BI5B 2 19
NC OE
B6B R457 100 BI6B BPDAT 3 18
DATA SO
B7B R458 100 BI7B BPCKA 4 17 BI10WB
CLOCK Q11
B8B R467 100 BI8B BPSTB 5 16 BI10B
LCK Q10
B9B R468 100 BI9B BI0B 6 15 BI9B
Q0 Q9
B10B R469 100 BI10B BI1B 7 14 BI8B
Q1 Q8
B10WB R470 100 BI10WB BI2B 8 13 BI7B
Q2 Q7
HF50B R471 100 HF50IB BI3B 9 12 BI6B
Q3 Q6
ATT12B R472 100 AT12IB BI4B 10 11 BI5B
Q4 Q5
ATT6B R473 100 AT6IB
ATT3B R474 100 AT3IB
+15V
T8V
MR8V
L395
330
+15V
a
display of TX frequency (MHz) port
0.030000 1.599999 B0
1.600000 1.999999 B1
2.000000 2.999999 B2
3.000000 3.999999 B3
4.000000 5.999999 B4
6.000000 7.999999 B5
8.000000 10.999999 B6
11.000000 14.999999 B7
15.000000 21.999999 B8
22.000000 29.999999 B9
30.000000 60.000000 B10
Q387
ATT AT3A AT6 AT12 DTC114EU
OFF L L L MR8V
BPF 3dB H L L
6dB L H L
UNIT
9dB H H L T8V
(1)
12dB L L H
15dB H L H
18dB L H H
21dB H H H
L: 2.0V H: 15.0V
+15V
T8V T8V
RMUTA RMUTA
+15V +15V
R871
220
RMUTB
Q874
DTC144EU Q871
DTA114EU
Q872
2SC4081
R874 R873
0 2.2k
Q873
2SC4116
+15V
A
B
+
-
DWSPB
+15V
R857
22
+
-
ATT3B ATT3B
b
RSELA
3.25V
BPCKA R141 220
BPSTA R142 220
BPDAT R143 220
BPOE R441 220
IC102 BPSTB R442 220
BU2099FV
1 20 +15V L902 HF50ACC322513
VSS VDD
2 19 L901 HF50ACC322513
NC OE
3 18 T8V L903 10
DATA SO
BPCKA 4 17 VHDWIA L904 10
CLOCK Q11
BPSTA 5 16 VPR2IA
LCK Q10
HF50IA 6 15
Q0 Q9 R134 100
AT12IA 7 14 RSELA
Q1 Q8
AT6IA 8 13 TRVS MESUREMENT CONDITIONS
Q2 Q7
voltage at RX
AT3IA 9 12 RMUTA
Q3 Q6 frequency: 14.1 MHz
10 11 DWSPA mode: J3E(USB)
Q4 Q5
ANT(RX): no input
(TX): no modulation
+15V +15V Digital tester
range: input impedance
200mV: 100M
14.9V
2V: 11M
BPOE BPOE 20V,200V,1000V: 10M
Explanatory notes
IC402
BU2099FV
VOLTAGE LINE
1 20
VSS VDD
RX LINE
2 19
NC OE
3 18
DATA SO
BPCKA 4 17 VHDWIB
CLOCK Q11
BPSTB 5 16 VPR2IB
LCK Q10
R475
HF50IB 6 15
Q0 Q9 100
AT12IB 7 14
Q1 Q8
AT6IB 8 13
Q2 Q7
AT3IB 9 12 RMUTB
Q3 Q6
10 11 DWSPB
Q4 Q5
+15V
T8V
MR8V
L394
C393 C395
330
0.015 0.015
TRV-TX
R382 C388
220 0.0047
Q381
DTC114EU
Q383
DTC114EU
Q384 -
DTC114EU
T8V
+
Q386 Q385
R395
DTC144EU DTC114EU
680
RX-B
R396
680
CP506
CP507
T8V
RMUTA
C402
C881 1
1
C876 R401 C401
0.0047 220 0.0047
Q404
DTC144EU Q403
DTA114EU
D872 Q402 D402
MA742 2SC4081 MA742
R404 R403
0 2.2k
Q401
2SC4116
+15V +15V
R851 R854
150 47
+ +
- -
ATT6B ATT6B
CP107
Q855
DTA114EU
CP106
+15V +15V
RX-ONLY
+ +
- -
RX-ANT
b
RSELA
80
NETWORK BOARD
NETWORK BOARD
J1
GND
BPCKA
BPSTA
BPDAT
BPOE
BPSTB
to LOGIC
NC
unit J812
+15V
+3R3V
T8V
MR8V
GND
J107
to MAIN
unit J802
J103
X-
VERTER
RX_ANT
OUTB(BNC)
J505
J506
from ANT-SW
unit J2
RX_ANT
J104 INA(BNC)
RX_ANT
INB(BNC)
J504
J4
TFAN
to
FAN
GND
RX_ANT
OUTA(BNC)
J105
J108
from ANT-SW
unit J3
MESUREMENT CONDITIONS
voltage at RX
frequency: 14.1 MHz
mode: J3E(USB)
J106
(TX): no modulation
from CTRL
TUNER ON
board J351
Digital tester
range: input impedance
Explanatory notes
VOLTAGE LINE
TX LINE
VHCI
RL10 RL20
VS-12MBU VS-12MBU
CI3 CI2 CI1
RL11 RL21
VS-12MBU VS-12MBU
CO3 CO2 CO1
VHCO
L90 L80 L70
LA-493 LA-492 LA-492
RL80 RL70 RL60
VS-12MBU VS-12MBU VS-12MBU
VHFT
14T 18T 24T
VHFT VHFT
L100 L110
LA-494 LA-594
RL90 RL100 RL110
VS-12MBU VS-12MBU VS-12MBU
10T 7T 5T 35T
35T 35T
35T
5T
7T
10T
14T
18T
24T
VHFT
7.5V
7.5V
Q300 R303 L300
CO3
2SB1123 120
CO2
CO1
VHCO
VHCI
CI3
CI2
6.7V
CI1
4.5V
Q301
DTC114EU
+15V
FANC
RL40
VS-12MBU J2
TUIN TUIN
from/to CTRL
board J251
RL30
VS-12MBU
CP1
CP3
RL31
VS-12MBU
CP4
CP2
RL41
VS-12MBU
TUOT
J3
TUOT
from/to CTRL
board J252
L60 L50
LA-593 LA-598
RL50
FTR-F1
L120 L130
LR-504 LR-505
RL120
VS-12MBU
J1
GND
GND
3R5M
5M
7M
10M
14M
18M
24M
VHF
GND
FANC
to CTRL
+15V
board J51
+15V
CO3
CO2
CO1
VHC0
VHCI NVHF
CI3
CI2
CI1
GND
GND
+15V
FANC